The Files app received a big update in iOS 13. Before, it was limited to local and cloud-based files, but now you can access data from external storage devices, including SD cards and USB drives. But before you try to connect your favorite card or drive to your iPhone, there are a few things you need to know.
Apple has finally given us a decent file manager in iOS 11. The new "Files" app replaces the not-very-old iCloud Drive app that appeared in iOS 9, but you can still access your iCloud Drive files in the new Files app, as well as files from third-party cloud services. A nice improvement, right?